Sheave for sliding doors



(ModeL) I. SOMERS SHEAVE FOR SLIDING DOORS.

Patented May 2, 1882.

jay g ATTORNEYS.

UNITED STATES PATENT OFFICE.

ISAAC SOMERS, OF DETROIT, MICHIGAN.

SHEAVE FOR SLIDING DOORS.

SPECIFICATION forming part of Letters Patent No. 257,401, dated May 2, 1882,

Application filed January 1882. (Model) To all whom it may concern:

Be it known that I, ISAAC SOMERS, of Detroit, in the county of Wayne and State of Michigan, have invented certain new and use fulImprovementsin Sheaves for Sliding Doors, of which the following is a full, clear, and exact description.

The object of this invention is to provide means for the vertical adjustment of the sheaves or rollers of sliding doors, whereby the doors may be readily raised or lowered on their sheaves, when desired, to compensate for any settling or irregularity in the floor or sup ports on which the sheaves travel.

The invention consists of a door-sheave made with an adjusting attachment, such as a wedge, whereby the sheave can be moved outwardly or inwardly in respect to its casing, so that when the sheave is applied to the door the latter may be raised or lowered, when desired, by operating the wedge, as will be hereinafter more fully set forth.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is an elevation of a sliding door having my improved sheaves applied thereto. Fig. 2 is a sectional elevation taken-on the line 00 00 of Fig. 3. Fig. 3 is a similar view taken on the line y g of Fig. 2, and Fig. 4 is a sectional plan view taken on the line a z of Fig. 2.

The sheave A is inclosed in the casing B, which is let into a recess cut in the corner of the door. The casing isformed with the angleplates a a, which are concaved, as shown at b 1), Figs. 3 and 4, and formed with the flanges c 0, through which screws pass into the edge and bottom of the door for securing the casin g in the recess. The sheave is journaled in the saddle D, which is adapted to slide in the ways formed by the flanges d d, cast upon the inside of the casing, as shown in Fig. 3 and in dotted lines in Fig. 2. The upper wall of the easing,immediately above the ways in which the saddle moves, is formed with the rib or projection E. Between this rib or projection and the upper end of the saddle, is placed the wedge F,by which the sheave may be adjusted.

The movement of the wedge for adjusting the sheave is accomplished from the outside of the door by means of the screw-rod G, which enters the screw-tap f in the wedge. outer end of this screw-rod is provided with the thumb-nut g, which rests in and is protected by the concave b of the vertical plate a, as shown clearly in Figs. 2 and 4. The lower edge of the sheave protrudes through the slot it, made through the angle -plate a, as shown in Fig. 2, so as to rest upon the rail upon which the door moves, and to clear the door from the rail and the floor. When it is desired to adjust the sheaves it is only necessary to turn the screw-rod g in one direction or the other, as circumstances may require, which will cause the wedge to be drawn forward or forced back, and the sheave moved out or in with respect to the casin g, and the door accordingly raised or lowered. By this means the door may be readily adjusted without removing it from its track or support, so as to compensate for any settling or irregularity of the floor or support, so that the door may always be made to run free and easy, and so that its edge will always make a tight joint with the casing or joint of the door, and in case there are two opposing doors they may always be adjusted so that their mectin g edges will come squarely together and make a tight joint. The concaved forma-' tion of the angle-plates gives them increased strength, and the plates protect the corners of the door, and owing to the flanges c c and the screws they act as clamps to prevent the corners from splitting or parting where the recesses are made. Besides, by means of the angle-plates and the casing the sheave may be placed very close to the edges of the door, cansin g the door to run steady upon its support.

I do not confine myself to the use of the adjustin g attachment in connection with sheaves to be attached to the bottom of the door, as the casing may be formed with depending arms or plates, whereby it may be attached to the upper edge of a door, and thus suspend the door upon a track or support, the wedge serving to adjust the sheave and door in the same manner as just described.

Having thus fully described my invention, I claim as new and desire to secure by LettersPat ent-- 1. In a door-sheave, the wheel A,adapted to have vertical movement, in combination with The the saddle D, the wedge F, and means for ad- G, secured to the wedge and reaching to the justing the wedge, substantially as described. outside or edge of the casing, substantially as 2. The wheel A, journaled in the saddle D, and for the purpose set forth. 15

in combination with the wedge F and the cas- 5. The casingforined with the plates at a and 5 ing formed with the flanges (Z 61, substantially flanges (Z (Z and E, in combination with the as described. 1 wheel A, saddle D, wedge F, and screw-rod G,

3. The casing formed with the guttered or substantially as and for the purposes set forth.

concaved an gle-plates a a in combination with a t the wedge F and screw Gfsubstantially as and IbAAb to for the purpose set forth. 1 Witnesses:

4.. The combination, with the vertically-mov- JOHN T. BROOKS,

able wheel A and wedge F, of the screw rod JOHN B. OONSIDINE. 

